Safety gas-cock.



No. 888,742. PATBNTBD MAY 26, 1908. K F. T. RICHTER.

SAFETY `GAS GOGK.

APPLIGATION FILED JAN.14. 1907.

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` the usual conical seat 114 4munica'tionfor the FERDINAND T. RICHTER, OF NEW YORK, N. Y.

SAFETY GAS-COCK.

Specification of Letters Patent.

Patentamay 2e, 1908.

Application led January 14, 1907. Serial No. 352,114.

To all whom it may concern:

Be it known that I, FERDINAND T. RICH- TER, a resident of New York, in the county of New York and State of New York, have invented certain new` and useful Improvements in Safety Gas-Cocks, of which the following is a full, clear, and exact description.v

The invention relates to safety-cocks.

In gas-valves it is desirable to lock the valve-plug against Iaccidental lorinadvertent shift to prevent escape of gas which so frequently produces fatal results.

The invention designs to provide a safety gas-cock of improved construction and more particularly one in which the valve-plugis ocked against rotation and which is at all times in engagement with its seat so there is no more likelihood of leakage than in the pommon tapered ground-fit plug of the usual crm.

The invention also designs to provide a safety gas-cock which is simple in construction and can be produced at a low cost.

The invention consists in the several novel features of construction hereinafter set forth and more particularly` defined by claim at the conclusion hereof.

In the drawings: Figurel is a vertical section of a safety-cock embodying the invention. Fi 2 is a similar view, the collar being raised in ocked position. Fig. 3 isa detail lplan, the cap for the valve being removed.

ig. 4 is a detail section of the sleeve extension of the valve, and Fig. 5 is a section on line 5 5 of Fig. 1. l

A valve-casing or body is provided with t'o which is itted a tapered plug 12. Usual ports 13 extend from the valve-seat to the ends thereof and the plu is provided with a semi-circular pe ripheralggroove lfadapted to establish compassage of gas through the valve-body'as Well as to interrupt it to control the fiow of gas. A washer 15 and nut 16 are screw-threaded to the inner end of the plug to hold the valvesnugly in engagement with the valve-seat.

A hole 17 extends longitudinally and centrally through the valve-plug -and through said hole extends the stem 18 of a key 19. The stem is rotatably connected to the plug, i. e., the stem is non-circular or polygonal and the hole 17 is `correspondingly shaped. The stem is also movable longitudinally in the plug-valve. lTo the upper end Iof the stom is secured, as by a screw-thread 20 and which Iit into a groove 24 y extension secured to the valve-body. A

key 21, a'collar 22.having rojecting studs 23 ormed in a sleevespring 3Q' isinterposed between collar 22 and nut 16of the plug to press thekey normally upward and into the notches 26 communicating with the groove in sleeve 24. Preferably the groove is beveled at as 27 to cause studs 23 to pass into notches 26, so the key and plug which are rotatably connected, Will be ocked against rotation and against accidental shift. A ca 28 ts over the sleeve extension to inclose the parts therein. The groove 14 in the plug extends around the periphery of the plug and does not communicate with the hole 17, and resultantly there is no possibility of leakage any more than in the usual valve, the plug being at all times held in its seat.` The key passes through a square hole in nut 16, to secure the latter against rota- Ytionwith respect to the plug.

In operation, the collar-studs 23 are normally held in notches 26 in sleeve 25 and the key and valve-plu are positively secured against rotation, t e held into locked position by spring 30. When it is desired to open the valve, the key 19 is withdrawn longitudinally, the stem 18 thereof being slidably held in the plug and saidmovement will cause collar-studs 23 to pass out of notches 26 and into the circular groove 24 when the key will be free to be rotated in either direction so the valve can be opened and regulated to supply the desired amount of as.

'Ighe valve ma be opened or close'd by rotation of the ey in either direction, a quarter turn being sulicient to bring the plug from open position into its locked position. When the valve is open, the spring frictionally holds the key and plug agamst rotation by ressing studs 23 against the upper edge o the straightdportion of groove 24 and if the key shoul be accidentally shifted when in open position the collar studs 23 will engage inclines 27 so the spring 3() key being yieldingly will automatically force the collar-studs 23- into notch 26 and positively lock the valve.l

The invention is not to be understood as restricted to the details shown and described since these may be modified Without departing from the spirit and sco e of the invention'.

Having thus described t e invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a safety gas-cock, the combination of a' valve-body provided With`a sleeve, a valvelug seated and rotatable in said body,

a key aving a stem longitudinally movable in the plug, said sleeve hav-ing a loekl oove on its inner peri hery, and means on t e key for engaging sai groove to look the plug and key a ainst rotation.

2. In a safety gas-oook, the combination of a valve-body provided with a sleeve, a valve# lug seated and rotatable in said body, a key aving a stern longitudinally movable Ain the plug, said sleeve having a look-groove on its inner periphery, means on the key for engaging said groove to look the lug vand key against rotation, and a spring o r yieldingly holding the key against longitudinal movement. t

3. In a safety gas-oook, the combination of a valve-body, a rotatable valve-plug extending through said body and having a peripheral gas-port, a key rotatable with said plug and havin a stem extending therethrough, means for ooking said plug against rotation, and a springfor yieldingly holding said key againstrotation.

FERDINAND T. RICHTER.

A -Witnessesz THOMAS GLEAsoN, DAVID L. WooBALL,"Jr. 

